SH7263 Datasheet, PDF (952/1862 Pages) Renesas Technology Corp – Renesas 32-Bit RISC Microcomputer SuperHTM RISC engine Family / SH7260 Series

Section 19 Controller Area Network (RCAN-TL1)
(1) Message Control Field
STDID[10:0]: These bits set the identifier (standard identifier) of data frames and remote frames.
EXTID[17:0]: These bits set the identifier (extended identifier) of data frames and remote frames.
RTR (Remote Transmission Request bit): Used to distinguish between data frames and remote
frames. This bit is overwritten by received CAN Frames depending on Data Frames or Remote
Frames.
Important: Please note that, when ATX bit is set with the setting MBC = 001(bin), the RTR bit
will never be set. When a Remote Frame is received, the CPU can be notified by the
corresponding RFPR set or IRR[2] (Remote Frame Receive Interrupt), however, as RCAN-TL1
needs to transmit the current message as a Data Frame, the RTR bit remains unchanged.
Important: In order to support automatic answer to remote frame when MBC = 001 (bin) is used
and ATX = 1 the RTR flag must be programmed to zero to allow data frame to be transmitted.
Note: when a Mailbox is configured to send a remote frame request the DLC used for
transmission is the one stored into the Mailbox.
RTR
0
1
Description
Data frame
Remote frame
IDE (Identifier Extension bit): Used to distinguish between the standard format and extended
format of CAN data frames and remote frames.
IDE
Description
0
Standard format
1
Extended format
Rev. 2.00 Mar. 14, 2008 Page 918 of 1824
REJ09B0290-0200